Hilgard, commonly known as Jack, enjoyed one of the longest and most productive careers in twentieth-century American psychology. As a scholar who synthesized and advanced important areas of research, a teacher of leading scientists and writer of influential textbooks, an administrator who played key roles in the development of academic and professional organizations, and a strong advocate for the application of psychological knowledge in the improvement of human life, Hilgard left a lasting mark upon the scientific, educational, professional, and social spheres in which he lived and worked. His most notable scientific contributions were his integration of cognitive and motivational factors in the analysis of conditioning and learning, his development of techniques to measure susceptibility to and the effects of hypnosis, and his theoretical speculations about different levels of consciousness.

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From. New Dictionary of Scientific Biography, 1E. © 2008 Gale, a part of Cengage Learning, Inc. Reproduced by permission. www.cengage.com/permissions

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